Energy storage system and connection method of energy storage system

Abstract

The invention discloses an energy storage system and a connection method of the energy storage system. The method comprises the steps that a plurality of battery packs are connected in series, each battery pack comprises a battery module and a corresponding battery management unit, the battery modules in the battery packs are connected with the corresponding battery management units, and the battery management units are used for collecting operation parameters of the corresponding battery modules; the plurality of battery packs connected in series are connected with the high-voltage box, the high-voltage box comprises a central management unit, and the central management unit is used for processing data acquired by respective battery management units of the plurality of battery packs; and the high-voltage bearing structure is connected with the high-voltage box and the battery packs connected in series to form a loop and is used for bearing impulse voltage generated after the energy storage system is connected to form the loop. The technical problem that the service life of the energy storage system is affected due to the fact that the impact voltage generated after the multiple battery packs and the high-voltage box are connected in series will impact circuits at the two ends of a connection point is solved.

Description

Technical Field

[0001] The present invention relates to the field of energy storage, and in particular to an energy storage system and a method for connecting the energy storage system. Background Art

[0002] The battery pack is an indispensable component in the energy storage system. The battery pack is composed of several cells connected in series or in parallel to provide power for the energy storage system. The characteristics of the battery pack are high input and output voltage and current, and each battery pack has a controller battery management unit (BMU). The BCU collects the single cell voltage and temperature of the battery cells in the battery pack through the acquisition harness or other acquisition media. In a complete energy storage system, a battery cluster is composed of multiple battery packs connected in series. These battery packs are connected in series through power lines or structural copper bars to connect the total positive and negative in series to the high-voltage box or DCDC (DC-to-DC Converter) of the battery cluster. The high-voltage box or DCDC has a central management unit (CMU), which has the function of collecting the total voltage and current of the battery cluster.

[0003] In the energy storage system, multiple battery packs are connected in series to a high-voltage box or DCDC to form a higher voltage. For example, in the current mainstream 1500V energy storage system, the battery packs are connected in series to a rated voltage of 1500V. The battery packs will form a very high voltage shock during the wiring or copper busbar connection process. This voltage shock directly affects the BMU in the battery pack, causing damage to the BMU.

[0004] To address the above-mentioned problems, no effective solution has been proposed yet. Summary of the invention

[0005] An embodiment of the present invention provides an energy storage system and a method for connecting the energy storage system, so as to at least solve the technical problem that the impact voltage generated after multiple battery packs and high-voltage boxes are connected in series will have an impact on the circuits at both ends of the connection point, thereby affecting the life of the energy storage system.

[0006] According to one aspect of an embodiment of the present invention, there is provided an energy storage system, comprising: a plurality of battery packs connected in series, the plurality of battery packs respectively comprising battery modules and corresponding battery management units, the battery modules in the plurality of battery packs being connected to corresponding battery management units, wherein the battery management units are used to collect operating parameters of the corresponding battery modules; the plurality of battery packs connected in series are connected to a high-voltage box, the high-voltage box comprising a central management unit, wherein the central management unit is used to process data collected by the battery management units of the respective plurality of battery packs; a high-voltage bearing structure is connected to the high-voltage box and the plurality of battery packs connected in series as a loop, and is used to bear the impact voltage generated after the energy storage system is connected as a loop.

[0007] Optionally, the high voltage bearing structure includes a transient voltage suppression circuit and a resistor-capacitor absorption circuit.

[0008] Optionally, there are multiple high-voltage bearing structures, and the multiple high-voltage bearing structures are connected to the battery management units of the multiple battery packs in a one-to-one correspondence.

[0009] Optionally, the high-voltage bearing structure includes a resistor in a central management unit, and a connecting switch, wherein the connecting switch is arranged between a plurality of battery packs connected in series and a high-voltage box, so that when the connecting switch is turned on, the high-voltage box and the plurality of battery packs are connected into a loop.

[0010] Optionally, the connecting switch is a load switch in a high-voltage box.

[0011] Optionally, the connection switch is arranged in the central management unit.

[0012] According to one aspect of an embodiment of the present invention, there is provided a method for connecting an energy storage system, which is applied to any one of the above energy storage systems, and comprises: connecting a plurality of battery packs, a high-voltage box and a high-voltage bearing structure in a predetermined order, so that the high-voltage bearing structure bears the impact voltage generated after the energy storage system is connected into a loop.

[0013] Optionally, multiple battery packs, high-voltage boxes and high-voltage bearing structures are connected in a predetermined order, including: connecting multiple battery packs in series to obtain multiple battery packs connected in series; connecting the multiple battery packs connected in series to a high-voltage box to obtain an energy storage system to be connected; and connecting the energy storage system to be connected to a high-voltage bearing structure.

[0014] Optionally, when the high-voltage bearing structure includes a resistor in the central management unit and a connecting switch, connecting the energy storage system to be connected to the high-voltage bearing structure includes: controlling the connecting switch to close so that the energy storage system to be connected is connected to the high-voltage bearing structure.

[0015] Optionally, when multiple high-voltage bearing structures are connected one-to-one with the battery management units of each of the multiple battery packs, the multiple battery packs, the high-voltage box and the high-voltage bearing structure are connected in a predetermined order, including: connecting the multiple high-voltage bearing structures one-to-one with the battery management units of each of the multiple battery packs, and connecting the multiple battery packs in series to obtain multiple battery packs connected in series; connecting the multiple battery packs connected in series to the high-voltage box.

[0016] In an embodiment of the present invention, a high-voltage bearing structure is provided in an energy storage system, and multiple battery packs are connected in series. The multiple battery packs respectively include battery modules and corresponding battery management units. The battery modules in the multiple battery packs are connected to the corresponding battery management units, wherein the battery management units are used to collect operating parameters of the corresponding battery modules; the multiple battery packs in series are connected to a high-voltage box, and the high-voltage box includes a central management unit, wherein the central management unit is used to process data collected by the battery management units of the multiple battery packs; the high-voltage bearing structure is connected to the high-voltage box and the multiple battery packs in series as a loop, and is used to bear the impact voltage generated after the energy storage system is connected as a loop, so as to achieve the purpose of concentrating the impact voltage generated after the multiple battery packs and the high-voltage box are connected in series on the high-voltage bearing structure, thereby achieving the technical effect of avoiding the impact voltage from impacting other devices in the energy storage system, and further solving the technical problem that the impact voltage generated after the multiple battery packs and the high-voltage box are connected in series will have an impact on the circuits at both ends of the connection point, thereby affecting the life of the energy storage system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0018] Figure 1 is a schematic diagram of an energy storage system provided according to an embodiment of the present invention;

[0019] Figure 2 is a schematic diagram of a high-voltage bearing structure provided according to an optional embodiment of the present invention;

[0020] Figure 3 is a schematic diagram of a connection switch provided according to an optional embodiment of the present invention;

[0021] Figure 4 is a schematic diagram of another connection switch provided according to an optional embodiment of the present invention;

[0022] Figure 5 A hardware structure block diagram of a computer terminal for implementing a connection method of an energy storage system is shown;

[0023] Figure 6 is a schematic flow chart of a method for connecting an energy storage system according to an embodiment of the present invention;

[0024] Figure 7 4 is a structural block diagram of a connection device for an energy storage system provided according to an embodiment of the present invention. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0026] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0027] In the energy storage system, multiple battery packs are connected in series to a high-voltage box or DCDC to form a higher voltage. For example, in the current mainstream 1500V energy storage system, the battery packs are connected in series to a rated voltage of 1500V. The battery packs will form a very high voltage shock during the wiring or copper busbar connection process. This voltage shock directly affects the BMU in the battery pack, causing damage to the BMU. To this end, the present invention provides an energy storage system with a high-voltage bearing structure. Figure 1 is a schematic diagram of an energy storage system provided according to an embodiment of the present invention, such as Figure 1 As shown, multiple battery packs are connected in series, and the multiple battery packs respectively include battery modules and corresponding battery management units. The battery modules in the multiple battery packs are connected to the corresponding battery management units, wherein the battery management units are used to collect operating parameters of the corresponding battery modules; the multiple battery packs connected in series are connected to a high-voltage box, and the high-voltage box includes a central management unit, wherein the central management unit is used to process data collected by the battery management units of the multiple battery packs; the high-voltage bearing structure is connected to the high-voltage box and the multiple battery packs connected in series as a loop, which is used to bear the impact voltage generated after the energy storage system is connected as a loop.

[0028] The battery pack is the basic unit of the energy storage system, usually composed of multiple battery cells and encapsulated in a shell to provide the required voltage and capacity. Inside the battery pack, the battery cells are combined into modules for more efficient management and control. The battery module can be regarded as a group of interconnected battery cells that work together to provide the required voltage and current. The Battery Management Unit (BMU) is the core control component of the battery pack, which is responsible for monitoring and managing the operating status of the battery module. The BMU can collect various operating parameters of the battery module, such as voltage, current, temperature, etc., and judge the health and performance of the battery based on this.

[0029] In order to obtain higher voltage and larger capacity, multiple battery packs are usually connected in series. In this way, the voltage of each battery pack is superimposed to form a higher total voltage. The high-voltage box is one of the key components of the energy storage system, which usually includes a central management unit (CMU). The CMU is responsible for receiving data from the BMUs of each battery pack and summarizing, analyzing and processing the data. The CMU can also remotely control and adjust the battery pack as needed to ensure the stable operation of the entire energy storage system.

[0030] When the energy storage system is connected as a loop, the voltage of the series connection of multiple battery packs will be applied to the circuit elements near the last connection point. For the circuit elements, this surge voltage will affect the stability and safety of the system. In the energy storage system, the high-voltage bearing structure is connected to the high-voltage box and the battery packs in series to form a complete loop. When the loop connection is completed, the high-voltage bearing structure can withstand the surge voltage generated after the energy storage system is connected as a loop to ensure the safety and reliability of the system.

[0031] A high-voltage bearing structure is provided in the energy storage system, wherein a plurality of battery packs are connected in series, wherein the plurality of battery packs respectively include battery modules and corresponding battery management units, and the battery modules in the plurality of battery packs are connected to the corresponding battery management units, wherein the battery management units are used to collect operating parameters of the corresponding battery modules; the plurality of battery packs in series are connected to a high-voltage box, and the high-voltage box includes a central management unit, wherein the central management unit is used to process data collected by the battery management units of the plurality of battery packs; the high-voltage bearing structure is connected to the high-voltage box and the plurality of battery packs in series as a loop, and is used to bear the impact voltage generated after the energy storage system is connected as a loop, thereby achieving the purpose of concentrating the impact voltage generated after the plurality of battery packs and the high-voltage box are connected in series on the high-voltage bearing structure, thereby achieving the technical effect of avoiding the impact voltage from impacting other devices in the energy storage system, thereby solving the technical problem that the impact voltage generated after the plurality of battery packs and the high-voltage box are connected in series will have an impact on the circuits at both ends of the connection point, thereby affecting the life of the energy storage system.

[0032] As an optional embodiment, the high voltage bearing structure includes a transient voltage suppression circuit and a resistor-capacitor absorption circuit.

[0033] Optionally, the high voltage bearing structure may include a transient voltage suppression circuit and a resistor and capacitor absorption circuit. When a transient voltage peak appears in the circuit, the transient voltage suppressor will respond quickly and reduce the voltage to a safe level. For example, a metal oxide semiconductor field effect transistor (MOV) exhibits high resistance under normal working conditions, but when the voltage exceeds its rated voltage, it can quickly change to a low resistance state and guide the current to the ground or other reference points, thereby suppressing overvoltage and protecting other electronic components from damage.

[0034] Transient voltage suppressors can respond quickly and limit transient voltage peaks in the circuit, preventing them from exceeding the withstand voltage of electronic components and avoiding component damage. They can also maintain voltage stability in the circuit by absorbing or dissipating overvoltage, ensuring the normal operation of energy storage devices. They can also provide additional protection for the circuit and reduce the risk of failure and damage.

[0035] The resistor-capacitor absorption circuit, also known as the RC circuit, is composed of a resistor and a capacitor. Its function is to absorb the electrical energy in the circuit through the capacitor, reduce the peak voltage in the circuit, and thus protect the device. When the voltage in the circuit suddenly increases, the capacitor begins to absorb the electrical energy, and at the same time the resistor limits the current to prevent excessive current from damaging the circuit. When the voltage in the circuit decreases, the capacitor releases the stored electrical energy, causing the current in the circuit to gradually return to normal. Among them, the selection of the resistance value and the capacitance value should be determined according to the actual circuit requirements to achieve the best protection effect.

[0036] In the high-voltage load-bearing structure, the transient voltage suppression circuit and the resistor-capacitor absorption circuit each play an important role. The transient voltage suppression circuit focuses on the rapid response and suppression of transient overvoltage, while the resistor-capacitor absorption circuit focuses more on the absorption and stabilization of voltage fluctuations in the circuit. The combination of the two can ensure the safety and stability of the entire energy storage system.

[0037] Figure 2 is a schematic diagram of a high-voltage bearing structure provided according to an optional embodiment of the present invention, such as Figure 2 As shown, the high-voltage bearing structure includes a transient voltage suppressor on the left and a resistor-capacitor absorption circuit connected to an analog front-end chip (Analog Front End, AFE) on the right.

[0038] As an optional embodiment, there are multiple high-voltage bearing structures, and the multiple high-voltage bearing structures are connected to the battery management units of the multiple battery packs one by one. Optionally, there can be multiple high-voltage bearing structures, each of which is connected to a battery management unit, which can protect the battery management unit from being affected by the surge voltage.

[0039] As an optional embodiment, the high-voltage bearing structure includes a resistor in a central management unit, and a connecting switch, wherein the connecting switch is arranged between multiple battery packs connected in series and a high-voltage box, so that when the connecting switch is turned on, the high-voltage box and the multiple battery packs are connected into a loop.

[0040] Optionally, the high-voltage bearing structure can be a connection switch and a resistor in a central management unit. The central management unit includes some resistors, which can serve as part of the protection circuit. The connection switch is arranged between the multiple battery packs connected in series and the high-voltage box, and plays the role of connecting the circuits between the multiple battery packs and the high-voltage box. When the connection switch is turned on, a complete circuit loop is formed between the battery pack and the high-voltage box, so that the battery pack can supply power to the high-voltage box. The importance of the connection switch lies in its ability to cut off the connection between the battery pack and the high-voltage box when necessary. When the connection switch is disconnected, the battery pack and the high-voltage box cannot form a complete circuit, nor can they generate a surge voltage. If multiple battery packs are connected in series, the connection switch is closed at this time, and the surge voltage will be mainly distributed on the resistors in the central management unit, so that the surge voltage will not affect other components in the circuit.

[0041] Therefore, the central management unit resistor and the connection switch in the high-voltage bearing structure work together to ensure stable operation between the battery pack and the high-voltage box, and minimize the impact of surge voltage on the circuit.

[0042] As an optional embodiment, the connection switch is arranged in the central management unit. Figure 3is a schematic diagram of a connection switch provided according to an optional embodiment of the present invention, such as Figure 3 As shown, the connection switch can be an additional control switch set inside the CMU, located on the line connecting the CMU and multiple battery packs. At this time, if the control switch is set to be closed last, so that multiple battery packs and the CMU in the high-voltage box form a loop, the voltage generated by the loop will be concentrated on the resistance inside the CMU, achieving the effect of carrying the impact voltage.

[0043] As an optional embodiment, the connecting switch is a load switch in the high-voltage box. Figure 3 As shown, the load switch is set after the CMU, that is, the closing and opening of the load switch cannot affect whether the CMU can form a complete circuit with multiple battery packs. Figure 4 is a schematic diagram of another connection switch provided according to an optional embodiment of the present invention, such as Figure 4 As shown, the connection switch can be a load switch inside the high-voltage box. At this time, the load switch can be adjusted before the CMU, so that after the load switch is closed, the CMU can form a complete loop with multiple battery packs. At this time, if the last closing control switch is set, so that multiple battery packs and the CMU in the high-voltage box form a loop, the voltage generated by the loop will be concentrated on the resistance inside the CMU, achieving the effect of bearing the impact voltage.

[0044] In order to further prevent the voltage shock formed during the connection of the battery pack or the copper busbar from causing damage to the energy storage system itself, according to an embodiment of the present invention, a method embodiment of connecting an energy storage system is also provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that here.

[0045] The method embodiment provided in the first embodiment of the present application can be executed in a mobile terminal, a computer terminal or a similar computing device. Figure 5 FIG. 1 shows a hardware structure block diagram of a computer terminal for implementing a connection method for an energy storage system. Figure 5As shown, the computer terminal 10 may include one or more (102a, 102b, ..., 102n are used to illustrate) processors (the processor may include but is not limited to a processing device such as a microprocessor MCU or a programmable logic device FPGA), a memory 104 for storing data. In addition, it may also include: a display, an input / output interface (I / O interface), a universal serial bus (USB) port (which may be included as one of the ports of the BUS bus), a network interface, a power supply and / or a camera. It can be understood by those skilled in the art that Figure 1 The structure shown is only for illustration and does not limit the structure of the above electronic device. Figure 1 More or fewer components as shown, or with Figure 1 Different configurations are shown.

[0046] It should be noted that the one or more processors and / or other data processing circuits described above may generally be referred to herein as "data processing circuits". The data processing circuits may be embodied in whole or in part as software, hardware, firmware, or any other combination thereof. In addition, the data processing circuit may be a single independent processing module, or may be incorporated in whole or in part into any of the other components in the computer terminal 10. As described in the embodiments of the present application, the data processing circuit acts as a processor control (e.g., selection of a variable resistor terminal path connected to an interface).

[0047] The memory 104 can be used to store software programs and modules of application software, such as program instructions / data storage devices corresponding to the connection method of the energy storage system in the embodiment of the present invention. The processor executes various functional applications and data processing by running the software programs and modules stored in the memory 104, that is, the connection method of the energy storage system of the above-mentioned application program is realized. The memory 104 may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 104 may further include a memory remotely arranged relative to the processor, and these remote memories may be connected to the computer terminal 10 via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0048] The display may be, for example, a touch screen liquid crystal display (LCD) that enables a user to interact with a user interface of the computer terminal 10 .

[0049] Figure 6 is a flow chart of a method for connecting an energy storage system according to an embodiment of the present invention. Figure 6As shown, the method: connect multiple battery packs, high-voltage boxes and high-voltage bearing structures in a predetermined order so that the high-voltage bearing structure can bear the impact voltage generated after the energy storage system is connected into a loop.

[0050] In this method, the high-voltage bearing structure is designed to withstand high-voltage shocks. When the energy storage system is connected as a loop (i.e., starts working), impact voltages may be generated due to the charging and discharging process of the battery pack, sudden changes in the load, and other reasons. These impact voltages need to be effectively carried by the high-voltage bearing structure to prevent damage to the system. Finally connecting the high-voltage bearing structure and the energy storage system to be connected can concentrate the impact voltage on the high-voltage bearing structure to avoid affecting other circuit components. Multiple battery packs, high-voltage boxes, and high-voltage bearing structures can be connected in a predetermined order, so that the high-voltage bearing structure can bear the impact voltage generated after the energy storage system is connected as a loop. For example, multiple battery packs are connected by wire, and then the battery packs are connected to the high-voltage bearing structure and the high-voltage box. At this time, the impact voltage will not be concentrated on a certain battery pack, but will be concentrated in the high-voltage bearing structure.

[0051] Through the above steps, the purpose of concentrating the impact voltage generated by connecting multiple battery packs and high-voltage boxes in series on the high-voltage bearing structure is achieved, thereby achieving the technical effect of preventing the impact voltage from impacting other devices in the energy storage system, and further solving the technical problem that the impact voltage generated by connecting multiple battery packs and high-voltage boxes in series will have an impact on the circuits at both ends of the connection point, thereby affecting the life of the energy storage system.

[0052] As an optional embodiment, multiple battery packs, high-voltage boxes and high-voltage bearing structures are connected in a predetermined order, including: connecting multiple battery packs in series to obtain multiple battery packs in series; connecting the multiple battery packs in series to a high-voltage box to obtain an energy storage system to be connected; connecting the energy storage system to be connected to a high-voltage bearing structure so that the high-voltage bearing structure bears the impact voltage generated after the energy storage system is connected into a loop.

[0053] Optionally, the battery packs are connected in series to increase the voltage of the entire energy storage system. Each battery pack has its rated voltage, and when they are connected in series, the voltages are accumulated to reach the desired output voltage value. The high-voltage bearing structure is designed to withstand high-voltage shocks. When the energy storage system is connected as a loop (i.e. starts working), shock voltages may be generated due to the charging and discharging process of the battery pack, sudden changes in load, and other reasons. These shock voltages need to be effectively carried by the high-voltage bearing structure to prevent damage to the system. Finally connecting the high-voltage bearing structure and the energy storage system to be connected can concentrate the shock voltage on the high-voltage bearing structure to avoid affecting other circuit components.

[0054] It should be noted that based on the structure of the energy storage system in the relevant technology, if it is possible to control multiple battery packs to be connected in series first to obtain multiple battery packs connected in series, and finally control the multiple battery packs connected in series to be connected to the high-voltage box, then the impact voltage of the loop connection can also be concentrated in the resistor included in the CMU, so as to minimize the impact of the impact voltage on other components in the energy storage system.

[0055] As an optional embodiment, when the high-voltage bearing structure includes a resistor in a central management unit and a connecting switch, connecting the energy storage system to be connected to the high-voltage bearing structure includes: controlling the connecting switch to close so that the energy storage system to be connected is connected to the high-voltage bearing structure.

[0056] In the connection switch according to Figure 3 and Figure 4 In the case of the setting shown, the connecting switch can be left open, and other connecting lines in the energy storage system can be connected first, and then the connecting switch can be closed. This can allow the impact voltage generated when the entire loop is connected to be concentrated near the connecting switch, so that the high-voltage bearing structure can bear the impact voltage without damaging other components in the energy storage system.

[0057] As an optional embodiment, when multiple high-voltage bearing structures are connected one-to-one with the battery management units of multiple battery packs, multiple battery packs, high-voltage boxes and high-voltage bearing structures are connected in a predetermined order, including: connecting multiple high-voltage bearing structures with the battery management units of multiple battery packs one-to-one, and connecting the multiple battery packs in series to obtain multiple battery packs connected in series; connecting the multiple battery packs connected in series to the high-voltage box.

[0058] In high-voltage load-bearing structures such as Figure 2 In the case shown, before connecting multiple battery packs to the high-voltage box, multiple high-voltage bearing structures need to be connected one-to-one with the battery management units of the multiple battery packs respectively, so that the corresponding high-voltage bearing structures can protect the battery packs from receiving impact voltage when connected to the high-voltage box as a whole.

[0059] It should be noted that, for the above-mentioned method embodiments, for the sake of simplicity, they are all described as a series of action combinations, but those skilled in the art should know that the present invention is not limited by the described action sequence, because according to the present invention, certain steps can be performed in other sequences or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

[0060] Through the description of the above implementation methods, those skilled in the art can clearly understand that the connection method of the energy storage system according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course it can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes a number of instructions for a terminal device (which can be a mobile phone, computer, server, or network device, etc.) to execute the methods described in each embodiment of the present invention.

[0061] In order to implement the energy storage system connection method provided by the present invention, according to an embodiment of the present invention, a connection device for an energy storage system is also provided. Figure 7 is a structural block diagram of a connection device of an energy storage system provided according to an embodiment of the present invention, such as Figure 7 As shown, the connection device of the energy storage system includes: a first connection module 71, a second connection module 72 and a third connection module 73. The connection device of the energy storage system is described below.

[0062] The first connection module 71 is used to connect multiple battery packs in series to obtain multiple battery packs connected in series.

[0063] The second connection module 72 is used to connect a plurality of battery packs connected in series to a high-voltage box to obtain an energy storage system to be connected.

[0064] The third connection module 73 is used to connect the energy storage system to be connected with the high-voltage bearing structure, so that the high-voltage bearing structure can bear the impact voltage generated after the energy storage system is connected into a loop.

[0065] It should be noted that the first connection module 71, the second connection module 72 and the third connection module 73 correspond to steps S602 to S606 in the embodiment, and the examples and application scenarios implemented by the multiple modules and the corresponding steps are the same, but are not limited to the contents disclosed in the above embodiment. It should be noted that the above modules, as part of the device, can be run in the computer terminal 10 provided in the embodiment.

[0066] In addition, an embodiment of the present invention may provide a computer device, on which the energy storage system connection method provided by the present invention is implemented to automate the control process and complete the energy storage system connection. Optionally, in this embodiment, the above-mentioned computer device may be located in at least one network device among multiple network devices of a computer network. The computer device includes a memory and a processor.

[0067] Among them, the memory can be used to store software programs and modules, such as the program instructions / modules corresponding to the connection method and device of the energy storage system in the embodiment of the present invention. The processor executes various functional applications and data processing by running the software programs and modules stored in the memory, that is, realizing the connection method of the above-mentioned energy storage system. The memory may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory may further include a memory remotely arranged relative to the processor, and these remote memories can be connected to the computer terminal via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0068] The processor can call the information and application programs stored in the memory through the transmission device to perform the following steps: connect multiple battery packs in series to obtain multiple battery packs in series; connect the multiple battery packs in series to a high-voltage box to obtain an energy storage system to be connected; connect the energy storage system to be connected to a high-voltage bearing structure so that the high-voltage bearing structure bears the impact voltage generated after the energy storage system is connected into a loop.

[0069] By adopting the embodiment of the present invention, a scheme for connecting an energy storage system is provided. Multiple battery packs are connected in series to obtain multiple battery packs in series; the multiple battery packs in series are connected to a high-voltage box to obtain an energy storage system to be connected; the energy storage system to be connected is connected to a high-voltage bearing structure, so that the high-voltage bearing structure bears the impact voltage generated after the energy storage system is connected as a loop, thereby achieving the purpose of concentrating the impact voltage generated after multiple battery packs and high-voltage boxes are connected in series on the high-voltage bearing structure, thereby achieving the technical effect of avoiding the impact voltage from impacting other devices in the energy storage system, and further solving the technical problem that the impact voltage generated after multiple battery packs and high-voltage boxes are connected in series will have an impact on the circuits at both ends of the connection point, thereby affecting the life of the energy storage system.

[0070] A person of ordinary skill in the art can understand that all or part of the steps in the various methods of the above embodiments can be completed by instructing the hardware related to the terminal device through a program, and the program can be stored in a non-volatile storage medium, and the storage medium may include: a flash drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, etc.

[0071] In addition, in order to ensure that the computer device can safely and stably run the energy storage system connection method provided by the present invention, an embodiment of the present invention also provides a non-volatile storage medium. Optionally, in this embodiment, the above non-volatile storage medium can be used to store the program code executed by the energy storage system connection method provided by the above embodiment.

[0072] Optionally, in this embodiment, the non-volatile storage medium may be located in any computer terminal in a computer terminal group in a computer network, or in any mobile terminal in a mobile terminal group.

[0073] Optionally, in this embodiment, the non-volatile storage medium is configured to store program codes for executing the following steps: connecting multiple battery packs in series to obtain multiple battery packs connected in series; connecting the multiple battery packs connected in series to a high-voltage box to obtain an energy storage system to be connected; connecting the energy storage system to be connected to a high-voltage bearing structure so that the high-voltage bearing structure bears the impact voltage generated after the energy storage system is connected into a loop.

[0074] An embodiment of the present invention further provides a computer program product, including a computer program, which, when executed by a processor, implements the steps of the energy storage system connection method in each embodiment of the present application.

[0075] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0076] In the above embodiments of the present invention, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0077] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0078] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0079] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0080] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a non-volatile storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, server or network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk and other media that can store program codes.

[0081] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An energy storage system, characterized in that: include: Multiple battery packs, high voltage boxes and high voltage bearing structures, among which, The multiple battery packs are connected in series, and the multiple battery packs respectively include battery modules and corresponding battery management units, and the battery modules in the multiple battery packs are connected to the corresponding battery management units, wherein the battery management units are used to collect operating parameters of the corresponding battery modules; The plurality of battery packs connected in series are connected to the high-voltage box, and the high-voltage box includes a central management unit, wherein the central management unit is used to process data collected by the battery management units of the respective plurality of battery packs; The high-voltage bearing structure is connected with the high-voltage box and the plurality of battery packs connected in series to form a loop, and is used to bear the impact voltage generated after the energy storage system is connected to form a loop.

2. The energy storage system according to claim 1, characterized in that: The high voltage bearing structure comprises a transient voltage suppression circuit and a resistor and capacitor absorption circuit.

3. The energy storage system according to claim 2, characterized in that: There are multiple high-voltage bearing structures, and the multiple high-voltage bearing structures are connected to the battery management units of the multiple battery packs in a one-to-one correspondence.

4. The energy storage system according to claim 1, characterized in that: The high-voltage bearing structure includes a resistor in the central management unit and a connecting switch, wherein the connecting switch is arranged between the multiple battery packs connected in series and the high-voltage box, so that when the connecting switch is turned on, the high-voltage box and the multiple battery packs are connected into a loop.

5. The energy storage system according to claim 4, characterized in that: The connecting switch is a load switch in the high voltage box.

6. The energy storage system according to claim 4, characterized in that: The connection switch is arranged in the central management unit.

7. A method for connecting an energy storage system, characterized in that: The energy storage system according to any one of claims 1 to 6 comprises: The plurality of battery packs, the high-voltage box and the high-voltage bearing structure are connected in a predetermined order so that the high-voltage bearing structure can bear the impact voltage generated when the energy storage system is connected into a loop.

8. The method according to claim 7, characterized in that The method of connecting the plurality of battery packs, the high voltage box and the high voltage bearing structure in a predetermined order comprises: Connecting the plurality of battery packs in series to obtain the plurality of battery packs connected in series; Connecting the plurality of battery packs connected in series to the high-voltage box to obtain an energy storage system to be connected; The energy storage system to be connected is connected to the high-voltage bearing structure.

9. The method according to claim 8, characterized in that In the case where the high-voltage bearing structure includes a resistor in the central management unit and a connecting switch, connecting the energy storage system to be connected with the high-voltage bearing structure includes: The connection switch is controlled to be closed so that the energy storage system to be connected is connected to the high-voltage bearing structure.

10. The method according to claim 7, characterized in that In the case where the plurality of high-voltage bearing structures are connected to the battery management units of the plurality of battery packs in a one-to-one correspondence, the connecting of the plurality of battery packs, the high-voltage box and the high-voltage bearing structure in a predetermined order includes: Connecting the plurality of high-voltage bearing structures to the battery management units of the plurality of battery packs one by one, and connecting the plurality of battery packs in series to obtain the plurality of battery packs connected in series; The plurality of battery packs connected in series are connected to the high voltage box.

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